Accurate simulation of W, Z and Higgs boson decays in Sherpa

Abstract

We discuss the inclusion of next-to-next-to leading order electromagnetic and of next-to leading order electroweak corrections to the leptonic decays of weak gauge and Higgs bosons in the SHERPA event generator. To this end, we modify the Yennie-Frautschi-Suura scheme for the resummation of soft photon corrections and its systematic improvement with fixed-order calculations, to also include the effect of virtual corrections due to the ex- change of weak gauge bosons. We detail relevant technical aspects of our implementation and present numerical results for observables relevant for high-precision Drell-Yan and Higgs boson production and decay simula- tions at the LHC.

35 pages, 8 figures

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Cited by in corpus (15)

• Event Generation with Sherpa 2.2
• Robust Independent Validation of Experiment and Theory: Rivet version 3
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• Study of $Z\to ll\gamma$ decays at $\sqrt{s}$= 8 TeV with the ATLAS detector